VACANCY INTERNSHIP PROJECT We are looking for students interested in carrying out their internship project at DAT.Mobility
Implementation of Mobility Hubs in a multi-constrained gravity model Problem description Cities around the world are currently facing inner city densification programs which will lead to system leaps regarding mobility. For example car usage will strongly decrease and other types of modes such as public transport, cycling and/or walking will increase. A change in car usage can be forced for example by a reduction of the parking norms (the ratio of number of parking places per house) or by parking facilities further away instead in front of the house. Mobility Hubs allow for spatial (inner city) compaction while maintaining (urban) accessibility. We want to gain experience with quantifying the impact of Mobility Hubs on the urban mobility using strategic transport models. In most Dutch urban strategic transport models, gravity models are used to describe mode and destination choices by travelers. The gravity model produces OD-matrices (origin-destination) per mode per time period. The models are usually doubly constrained, which means that the total number of departures and arrivals per zone are constrained to equate to precalculated values based on the land use within the zones. Recently, we have extended the doubly constrained model into a multi-constrained model. This means that observed mode- and destination choices (e.q. mobile phone data, OV-chipcard data or ANPR data) can be added as equality constraints to the gravity model, and included in the OD-matrix estimation. The extension also includes the ability to define inequality constraints, which allows for inclusion of e.g. parking capacity constraints.
Internship / Master thesis assignment The goal of this research is to implement and analyze various Mobility Hub scenarios in the multi-constrained gravity model. Therefore, a literature research into modelling Mobility Hub scenarios should be conducted to complete the overview of possible solution methods, possibly supplemented by your own ideas or methods. Furthermore, the student should get acquainted with the current multi-constrained gravity model implementation. After the literature research, one or some of the different solutions should be implemented and tested, bearing in mind that data requirements of both estimation and application context, scalability and calculation time are the most important selection criteria. The concepts of Mobility Hubs should be tested in a showcase by making use of an available model system. In the showcase the results of the various scenarios should be compared and sensitivity analysis will be performed. Interpretation of the outcomes is an important part of this study. For this research question OmniTRANS transport planning software will be used alongside with the multi-constrained gravity model implemented in Matlab.
Research group DAT.Mobility Deventer Daily supervisor: Ir. Klaas Friso (DAT.Mobility) When interested in this Internship or Masters thesis assignment on the implementation of Mobility Hubs in a multiconstrained gravity model, please contact Ir. Klaas Friso (kfriso@dat.nl, +31 (06) 11519996)